prokaryotic mRNA in frozen tissues or fluids

[Dr. Maxout]

>   After how long can prokaryotic mRNA found in frozen tissues or body fluids
>     of an animal (eg. fish) be used in a successful reverse transcription
>     polymerase chain reaction(RT-PCR)?
> 
As long as the tissue is handled and stored properly,eg. RNase free
containers and a steady -80, it should be good for at least 6 months to
one year or more.

Have fun. Kevin.